1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
# -*- coding: utf-8 -*-
# Python side of the testing protocol.
if PYTHON3:
import os, signal, subprocess
else:
__metaclass__ = type
import os
try:
import signal
except ImportError:
# Jython misses this module.
signal = None
try:
import subprocess
except ImportError:
# Jython misses this module.
subprocess = None
# Make sure that ../Pymacs will be found within this process.
import sys
if '..' not in sys.path:
sys.path.insert(0, '..')
import Pymacs
lisp = Pymacs.lisp
class Launch:
# Make sure that ../Pymacs will be found in external processes.
def __init__(self):
self.pythonpath_saved = os.environ.get('PYTHONPATH')
os.environ['PYTHONPATH'] = '..'
def __del__(self):
if self.pythonpath_saved is None:
del os.environ['PYTHONPATH']
else:
os.environ['PYTHONPATH'] = self.pythonpath_saved
class Emacs(Launch):
# Requests towards Emacs are written to file "_request", while
# replies from Emacs are read from file "_reply". We call Emacs
# attention by erasing "_reply", and Emacs calls our attention by
# erasing "_request". These rules guarantee that no file is ever
# read by one side before it has been fully written by the other.
# Busy waiting, with built-in delays, is used on both sides.
popen = None
def __init__(self):
Launch.__init__(self)
self.cleanup()
import atexit
atexit.register(self.cleanup)
emacs = os.environ.get('EMACS') or 'emacs'
self.command = emacs, '-batch', '--no-site', '-q', '-l', 'setup.el'
if subprocess is None:
self.command = self.command + ('-f', 'run-one-request')
else:
self.command = self.command + ('-f', 'run-all-requests')
def cleanup(self):
if self.popen is not None:
self.popen.poll()
if self.popen.returncode is None:
if signal is not None:
os.kill(self.popen.pid, signal.SIGINT)
os.waitpid(self.popen.pid, 0)
self.popen = None
if os.path.exists('_request'):
os.remove('_request')
if os.path.exists('_reply'):
os.remove('_reply')
def receive(self):
if subprocess is None:
handle = open('_reply')
buffer = handle.read()
handle.close()
else:
import time
while os.path.exists('_request'):
self.popen.poll()
assert self.popen.returncode is None, self.popen.returncode
time.sleep(0.005)
self.popen.poll()
assert self.popen.returncode is None, self.popen.returncode
if PYTHON3:
handle = open('_reply', newline='')
else:
handle = open('_reply')
buffer = handle.read()
handle.close()
return buffer
def send(self, text):
if PYTHON3:
handle = open('_request', 'w', newline='')
else:
handle = open('_request', 'w')
handle.write(text)
handle.close()
if subprocess is None:
status = os.system(' '.join(self.command))
assert status == 0, status
else:
if os.path.exists('_reply'):
os.remove('_reply')
if self.popen is None:
self.popen = subprocess.Popen(self.command)
self.popen.poll()
assert self.popen.returncode is None, self.popen.returncode
def start_emacs():
Emacs.services = Emacs()
def stop_emacs():
Emacs.services.cleanup()
def ask_emacs(text, printer=None):
if printer is not None:
text = '(%s %s)' % (printer, text)
Emacs.services.send(text)
return Emacs.services.receive()
class Python(Launch):
def __init__(self):
Launch.__init__(self)
# Start a Pymacs helper subprocess for executing Python code.
import subprocess
self.process = subprocess.Popen(
[os.environ.get('PYTHON') or 'python',
'-c', 'from Pymacs import main; main(\'..\')'],
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
text = self.receive()
assert text == '(version "@VERSION@")\n', repr(text)
if PYTHON3:
def receive(self):
# Receive a Lisp expression from the Pymacs helper.
stdout = self.process.stdout
data = stdout.read(3)
if not data or data[0] != ord(b'<'):
if data == b'Tra':
# Likely a traceback, and the Pymacs helper terminated.
diagnostic = (
'got:\n' + (data + stdout.read()).decode('UTF-8'))
else:
diagnostic = 'got ' + repr(data)
raise Pymacs.ProtocolError("'<' expected, %s\n" % diagnostic)
while data[-1] != ord('\t'):
data += stdout.read(1)
return str(stdout.read(int(data[1:-1])), 'UTF-8')
else:
def receive(self):
# Receive a Lisp expression from the Pymacs helper.
stdout = self.process.stdout
data = stdout.read(3)
if not data or data[0] != '<':
if data == 'Tra':
# Likely a traceback, and the Pymacs helper terminated.
diagnostic = 'got:\n' + data + stdout.read()
else:
diagnostic = 'got ' + repr(data)
raise Pymacs.ProtocolError("'<' expected, %s\n" % diagnostic)
while data[-1] != '\t':
data += stdout.read(1)
return stdout.read(int(data[1:-1]))
if PYTHON3:
def send(self, text):
# Send TEXT, a Python expression, to the Pymacs helper.
stdin = self.process.stdin
data = text.encode('UTF-8')
if text[-1] == '\n':
stdin.write(('>%d\t' % len(data)).encode('ASCII'))
stdin.write(data)
else:
stdin.write(('>%d\t' % (len(data) + 1)).encode('ASCII'))
stdin.write(data)
stdin.write(b'\n')
stdin.flush()
else:
def send(self, text):
# Send TEXT, a Python expression, to the Pymacs helper.
stdin = self.process.stdin
if text[-1] == '\n':
stdin.write('>%d\t%s' % (len(text), text))
else:
stdin.write('>%d\t%s\n' % (len(text) + 1, text))
stdin.flush()
def start_python():
Python.services = Python()
def stop_python():
Python.services.process.kill()
def ask_python(text):
Python.services.send(text)
return Python.services.receive()
|
